268results about How to "Improve sampling effect" patented technology

The invention discloses a drilling grabbing shovel type combined sampler device for planetoid detection and a use method of the drilling grabbing shovel type combined sampler device. The device comprises a feeding mechanism, a drilling mechanism, a grabbing shovel mechanism and a mounting plate. The use method comprises the following steps of (1) resetting a motor; (2) checking the motor; (3) performing sampling by a grabbing shovel motor; (4) detecting a shovel; (5) rotating a drilling rod to downwards move; (6) checking the drilling rod; (7) lifting the drilling rod; (8) checking the drilling rod; (9) performing sampling; (10) checking a sampling pipe; (11) enabling the drilling mechanism to upwards move; (12) checking a micro switch contact; (13) stopping a feeding motor; (14) checking a sampler; (15) arranging samples; (16) checking the shovel; (17) arranging the samples; (18) checking the sampling pipe; and (19) performing resetting. According to the drilling grabbing shovel type combined sampler device for planetoid detection and the use method of the drilling grabbing shovel type combined sampler device, sample collection can be realized on the surface of a planetoid, and deep sampling can be executed; bedding information of the samples can be kept; the device has the advantages of large sampling amount, various sample types, retention of original appearances of the samples and the like.

The invention relates to a water source sampling detection device, in particular to a hydrogeological investigation water source sampling detection device. The technical problem to be solved by the invention is to provide the hydrogeological investigation water source sampling detection device with the advantages of convenience in operation, good sampling effect and novel structure. In order to solve the technical problem, the hydrogeological investigation water source sampling detection device provided by the invention comprises a cylinder, a piston, a telescopic rod, sliding rails, slide blocks, a first connecting rod, a first gear, a first motor, a first joint lever, a fixing plate, an electric push rod, a nut, a right bearing block, a lead screw, a left bearing block, a servo motor, a top plate, a second joint lever, a second gear, a second connecting rod, an L-shaped connecting rod, a left rack, a sampling frame, a bottom plate, a sampling cup and a sampling needle tube, wherein the left rack, the sampling frame and the sampling cup are sequentially arranged on the top of the bottom plate from the left to the right. The device disclosed by the invention achieves the effects of convenience in operation, good sampling effect and novel structure.

A first series of filter coefficients stored in a memory itself corresponds to a given filter characteristic such as a given high cutoff frequency. A second series of filter coefficients is generated by performing an interpolation process on the first series of filter coefficients. At that time, the contents, such as interpolation coefficients, of the interpolation process are varied in correspondence to a desired filter characteristic to be achieved, so that the interpolation process generates a second series of filter coefficients according to an impulse response characteristic that is obtained as a consequence of expanding or compressing, in a time-axis direction, an impulse response characteristic represented by the given first series of the filter coefficients. Thus, by the interpolation process, there is produced such a second series of filter coefficients that achieves a different filter characteristic (e.g., different high cutoff frequency). Where the sampling frequency of a time series of digital signals is to be changed from a given first frequency to a second frequency, an aliasing noise frequency may vary depending on a value of the first or second sampling frequency, in which case it is necessary to vary the cutoff frequency of a filter for eliminating the aliasing noise. However, by performing the interpolation process in the above-noted manner, the filter characteristic for eliminating the aliasing noise can be varied as desired.

The invention relates to multistage marine water quality stratified sampling equipment and a sampling method thereof. The multistage marine water quality stratified sampling equipment comprises a floating plate, a pay-off device and a sampling device, wherein the floating plate is of a rectangular structure, the pay-off device is installed at the upper end of the floating plate, the sampling device is arranged below the floating plate, and the sampling device is connected with the pay-off device through a steel wire rope. The problems as follows are solved: when the existing equipment is usedfor sampling the ocean water quality, the sampling effect is poor and the sampling is inaccurate, and stratified sampling cannot be effectively carried out on seawater with different depths, which isnot conducive to the study of ocean water quality; and the existing equipment cannot effectively seal the sampled seawater when sampling the ocean water quality, so that the sampled seawater is easilymixed with seawater in areas with different depths, the sample is inaccurate, and the accuracy of a water sample analysis result is influenced.

The invention relates to a single-resistor current sampling method and system. The single-resistor current sampling method comprises the steps as follows: whether a duty ratio control signal reaches duty ratio limiting conditions or not according to a first difference value, a second difference value and a time median of the duty ratio control signal in a motor operating process, wherein the first difference value is the difference between the time median and the minimum time value; the second difference value is the difference between the maximum time value and the time median; if the duty ratio control signal reaches the duty ratio limiting conditions, the motor operating frequency of a motor is obtained and the operating angle of a rotor in the motor in the next control beat is predicted according to the motor operating frequency; and first phase current and second phase current of the motor are obtained according to the operating angle of the rotor in the next control beat. By the single-resistor current sampling method and system provided by the invention, the integrity of the single-resistor current sampling scheme in the motor operating process is ensured; and the single-resistor current sampling effect is improved.

The invention discloses an icon recognition method. The method comprises the steps of acquiring P frames of to-be-detected images randomly from a to-be-detected video; carrying out edge detection on ato-be-detected image in the P frames of to-be-detected images to obtain a target edge detection image set, the target edge detection image set comprising M target edge detection images, and each target edge detection image being obtained by fusing P edge detection images; determining an icon area according to the target edge detection image set; determining an icon in the to-be-detected video according to the P frames of to-be-detected images and the icon area; and matching the icon with a preset icon set, and obtaining an icon recognition result of the to-be-detected video, the preset icon set comprising at least one preset icon. The invention further discloses the device. According to the method, the diversity of background changes of the station captions can be increased through randomsampling, a better sampling effect is achieved, the method is suitable for detecting the static station captions and the dynamic station captions, and therefore the recognition accuracy is improved.

The invention discloses a liquid sample sampling device and method used for detection of a quick-detection sample and provides an all-in-one machine. The liquid sample sampling device comprises a sampling device shell, an adjusting barrel, a sampling device inner column and one-way check valves, wherein the adjusting barrel is mounted at an opening end of the sampling device shell through thread connection; the middle part of the sampling device inner column penetrates through the adjusting barrel and can slide along the axial direction; a spring is fixedly connected between the sampling device inner column and the adjusting barrel; one connector in two connectors of the sampling device shell is connected with a tee joint; residual two pipe openings of the tee joint are connected with a first one-way check valve and a ball valve respectively; and the second connector on the sampling device shell is connected with a second one-way check valve. According to the liquid sample sampling device and method, disclosed by the invention, previous three sampling devices, a standard solution container and a detection liquid sampling device are integrated into an organic whole body, so that the utilization efficiency is improved, sampling, mixing and detection can be finished by the device in one step, and the sampling detection efficiency is improved.

The present invention discloses soil sample sampling equipment based on a combined-type soil sample horizontal cutting apparatus, the soil sample sampling equipment includes two stand columns, an upper beam, an electric rotating seat, an electric lower press head, a soil sampling cutter located just below the electric lower press head, a lower press plate installed on the upper part of the soil sampling cutter and the combined-type soil sample horizontal cutting apparatus arranged on the outer side of the soil sampling cutter, the soil sampling cutter comprises an annular cutter and a cylindrical protection tube, a control box is arranged on the stand columns, the combined-type soil sample horizontal cutting apparatus comprises a lower position limitation ring, a plurality of side pushing panels and an upper pressure ring; the lower position limitation ring is a round ring with a cutting steel wire winding around the outer wall of one side, and the bottom of the lower position limitation ring is provided with a cutter edge, the outer side wall of the bottom of the lower position limitation ring is provided with two horizontal rings, two ends of the cutting steel wire respectively pass through the two horizontal rings, the side pushing panels are fixed on the upper pressure ring by a vertical connecting plate. The soil sample sampling equipment is simple in structure, reasonable in design, easy in use and operation, and good in use effect, and can simply and rapidly complete a sampling procedure, and the sampling effect is good.

The invention relates to a microorganism aerosol sampling device which comprises a microorganism solution atomization generation device, a compressed air gasification device, a microorganism aerosol generation device and a sampling vessel, wherein the microorganism solution atomization generation device is connected and mixed with the compressed air gasification device and then connected with the front end of the microorganism aerosol generation device; the sampling vessel is connected onto the tail end of the microorganism aerosol generation device. According to the invention, the microorganism solution atomization generation device, the compressed air gasification device, the microorganism aerosol generation device and the sampling vessel are adopted, and through arrangement of quincuncial spraying holes and refining spray nozzles, the generation quality of microorganism aerosol is ensured; through arrangement of a boosting cylinder, a primary filter cartridge and a pressure stabilization cylinder, the quality and precision of air obtained through compression of the compressed air gasification device are ensured, and the generation quality of microorganism aerosol is further ensured; a sampling film and normal saline are adopted for sampling, so that the sampling quality and sampling rate are ensured, and the sampling capacity is improved.

The invention discloses a drilling type garbage sampling device and method. The drilling type garbage sampling device is characterized by comprising a sampling barrel, a support system and a switching and hoisting system, which are connected and matched with one another, wherein the sampling barrel is a cavity body which is composed of a cylinder body and a blade plate, and the blade plate is used for cutting and separating garbage at the periphery of the sampling barrel; the support system is composed of a cover body, is connected with the sampling barrel through a bolt and is used for strengthening the intensity and stress of the device, the switching and hoisting system is composed of a baffle plate, a connecting rod, a lifting disc and a lifting rod, which are assembled, the switching and hoisting system is articulated with the sampling barrel for controlling on and off of the device, and the lifting rod and the cover body are in clearance fit for relative movement and limiting. The sampling device provided by the invention has the advantages that a sampling effect is good, the structure is simple, the manufacturing cost is low, and the sampling device is convenient to carry and maintain, is easily combined with a drilling machine for deep sampling, and is suitable for popularizing and using.

The invention discloses a staged multi-strategy-based group conformation space sampling method. The method comprises the following steps: dividing a whole algorithm process into a plurality of stages under the framework of a differential evolution algorithm, setting a group of strategy pools for each stage, and when the algorithm achieves a certain stage, randomly selecting a strategy from the corresponding strategy pool to generate a new test conformation individual on the basis of a fragment assembling technology, so as to improve the conformation sampling ability and the convergence rate of the algorithm; introducing distance spectrum constraint in the conformation selection link, when the energy of the tested conformation is higher than a target conformation, comparing the distance differences of the tested conformation and of the target conformation, and if the distance difference of the test individual is relatively small, receiving the tested conformation at a certain probability, so as to guide the algorithm sampling to obtain a conformation with lower energy and a more reasonable structure and then improve the prediction precision of the algorithm.

The present invention provides a modularization MR device imaging method. An MR device comprises an MR calculation module, an MR optical path module and an MR posture module; the MR calculation module comprises a display module; the MR calculation module is connected with the MR posture module, and the display content is regulated according to the data collected by the MR posture module; the MR optical path module comprises a virtual image optical path and a mixed optical path; the virtual image optical path is connected with the display module; the mixed optical path is provided with a half transparent and half reflecting mirror; one surface of the half transparent and half reflecting mirror is a real image introduce surface, and the other surface of the half transparent and half reflecting mirror is a virtual image introduce surface; the real image introduce surface faces a real environment; the virtual image introduce surface faces the virtual image optical path; and the display content of the display module is processed through the virtual image optical path and transmitted to form a virtual image, the light ray of the virtual image is reflected through a virtual image introduce surface to an observation end and the light ray in the real environment is transmitted to the observation end through the real image introduce surface to mix with the virtual image to form a mixed real image. The modularization MR device imaging method can prepare a low-cost MR device and can flexibly define a rich MR interaction effect.

The invention discloses a multifunctional grab bucket type water-sludge collector which comprises a grab bucket, a power-assisting rod used for spreading the grab bucket, and a pull rod, wherein the grab bucket comprises a first grab bucket part and a second grab bucket part, upper ends of the first grab bucket part and the second grab bucket part are movably connected, the first grab bucket part and the second grab bucket part can be opened or closed around a connecting part, through holes are formed in the upper ends of the first grab bucket part and / or the second grab bucket part, the pull rod penetrates through the through holes, one end of the power-assisting rod is movably connected with the pull rod, and the other end of the power-assisting rod is movably connected with the inner wall of the grab bucket. The multifunctional grab bucket type water-sludge collector has the beneficial effects of multiple functions, simple structure, convenience in use and low manufacture cost, and is easy to popularize in the market.

The invention discloses a soil layer sampling device for geological exploration. The device comprises a rack, wherein a sampling rod is arranged in the middle of the rack; a spiral blade is welded onthe periphery of the lower side of the sampling rod; a bearing block is arranged on the upper side of the rack, a driving mechanism is mounted on the bearing block, a plurality of springs are arrangedbetween the bearing block and the rack, crank levers are hinged to two ends of the bearing block, and the other ends of the crank levers are correspondingly hinged to two ends of the rack; drill bitsare arranged at the lower end of the sampling rod, a sampling assembly is mounted on the inner side of the lower end of the sampling rod, a sampling piston is arranged on the inner side of the sampling assembly, a limiting cavity is formed in the sampling rod on the upper side of the sampling assembly, a limiting piston is glidingly arranged in the limiting cavity in a matched manner, and a buffer cavity is formed in the sampling rod on the upper side of the limiting cavity. During use, the soil layer sampling device is higher in stability and can reduce bending torsion received by the device, the working efficiency of the device is improved, the service life of the device is prolonged, the sampling effect is good, and guarantee is provided for soil layer sampling operation.

The invention discloses a sampling exploration device and method. The sampling exploration device comprises a shell, wherein the top part of the inner side of the shell is provided with a first electric pushing rod, the output end of the first electric pushing rod is provided with a sampling apparatus, the sampling apparatus comprises a separation cover, the top end of the inner side of the separation cover is provided with a second electric pushing rod, the bottom output end of the second electric pushing rod is provided with a motor, the output shaft of the motor is connected with a sampling cylinder in a transmission manner, and the top end of the sampling cylinder is provided with a rotation bracket. The sampling exploration device is provided with the sampling apparatus, the samplingcylinder is driven by the motor to rotate, a sawtooth cutting blade is used for cutting a sludge bed, the sampling cylinder is pressed by the second electric pushing rod to collect a sample, the sludge bed rises in the sampling cylinder and pushes the piston to rise, the water in the sampling cylinder is discharged from a water discharging hole, only the sludge bed is reserved under the effect ofa one-way valve, after the sampling is completed, the second electric pushing rod is retracted, and a third electric pushing rod pushes a closing plate to close a groove, so that the sample can be prevented from dropping, and the seawater can be prevented from damaging the sludge bed.

The invention discloses a geological prospecting sampling device and a using method thereof. The geological prospecting sampling device comprises a supporting piece with the bottom supported on the ground and the top provided with two grabbing parts; a first driving piece which is connected to the top of the supporting piece; a first gear which is connected to the top of the supporting piece and engaged with the first driving piece; guide rods are connected into the supporting piece at intervals; a screw rod assembly of which one end is in clearance fit with the guide rods, and the other end penetrates through the first gear; and a rotary sampling piece which is connected to the screw rod assembly; the bottom of the supporting piece is inserted into the ground and supported on the ground;the first driving piece is linked with the first gear to rotate, and the screw rod assembly and the rotary sampling piece move downwards along the first gear and the guide rod; the rotary sampling piece is continuously inserted into the ground, and a soil sample is retained in the rotary sampling piece; the technical problems that soil at multiple positions cannot be sampled at the same time, thesampling efficiency is poor, it is difficult to take out soil samples from the interior of the device after sampling, and the working intensity of operators is high are solved.

The invention discloses an adjustable soil sampling device for environmental monitoring, and relates to the technical field of environmental monitoring. The adjustable soil sampling device comprises amoving frame, a servo motor is in driving connection with a lifting mechanism used for lifting soil, an elastic stabilizing mechanism vertically corresponding to a vertical through hole is installedon the lifting mechanism in a sliding mode, and a conveying mechanism used for conveying the soil is installed on the lifting mechanism. The lifting mechanism is driven by the double-shaft motor to achieve the vertical adjusting effect on the lifting mechanism; the vertical insertion pipe extends into soil; the spiral shaft is rotated and lifted upwards to sample soil; flexible sampling of soil atdifferent depths is achieved according to adjustment of the lifting mechanism, an annular plate in the elastic stabilizing mechanism drives an inserting nail to be inserted into the soil, the limiting effect on the soil around the sampling position is achieved, the stability of the soil structure is guaranteed, the stability degree of the soil sampling process is higher, and the soil sampling effect is improved.

The invention discloses a high-precision telescopic water area stratified sampling device for water quality monitoring. The device comprises a floating seat, a first sampling cylinder, a second sampling cylinder, a water storage bin and a scraping blade, a driving impeller is arranged on the side surface of the floating seat, a second reel is fixed at the upper end of a rotating shaft through a bolt, and a movable plate sleeves the outer side of the upper end of the rotating shaft; and a limiting hole is formed in the side face of the movable plate, a limiting block is arranged on the outer side of the inner wall of the water storage bin, a reset spring is connected between the limiting block and the water storage bin, and a second pull rope is connected between the floating plate and thesecond winding wheel. The high-precision telescopic water area stratified sampling device for water quality monitoring is provided with the multiple telescopic first sampling cylinder and second sampling cylinder, water samples of different depths in different water areas can be quantitatively collected, the sampling efficiency and precision are high, meanwhile, a filter screen mechanism can be automatically cleaned, blockage of the sampling mechanism is avoided, and operation is convenient and fast.

The invention relates to a sampling device and particularly relates to an environment-friendly movable sampling device for industrial wastewater. The environment-friendly movable sampling device for the industrial wastewater has the beneficial effects that the sampling effect is good, the sampling speed is high, and the sampling is accurate. The environment-friendly movable sampling device for the industrial wastewater comprises a base, a left side plate, a speed reduction motor, a first slide rail, a top plate, a third slide rail, a first transverse plate, a second transverse plate, a first gear, a first side block, a placement frame and the like, wherein the top plate, the third slide rail, the first transverse plate and the second transverse plate are sequentially arranged on the right side of the left side plate from top to bottom, the first gear is connected to the rear side of the speed reduction motor, and the first slide block is connected to the first slide rail in a sliding manner. According to the environment-friendly movable sampling device, fan-shaped stirring blades are adopted, multiple first holes are formed in a stirring rod, and an electromagnet, an iron block, a second spring and a rubber pad are arranged in a placement platform.

The invention discloses a sampling device for a column-shaped sample of shallow water sediment which includes a sampling tube component, a stress application component and a connector component arranged between the sampling tube component and the stress application component; the sampling tube component includes a sampling tube; the connector component includes a lower flange and a connecting piece connected by a bolt, a sealing piece arranged between the lower flange and the connecting piece, a connector connected on the connecting piece and a holding valve arranged in the connector and the connecting piece; the stress application component includes a plurality of hollow connecting rods connected on the connector and the top parts of the connecting rods are provided with ventilating screwed plug; the sampling tube passes through the lower flange and a lock ring, extents into the connecting piece and is fixedly connected on the lower part of the connecting component through a bolt. By adopting the invention, the initial state of the column-shaped sample of the shallow water sediment can be maintained and good sampling effect is obtained. The invention has the advantages of compact structure, easy carry, convenient operation and being able to adapt various field sampling conditions.

The invention relates to a device and a method for preparing an undisturbed soil sample of a ring cutter. The device comprises a work table, a support column, a soil sample lower backing plate, a force transmission frame, a pressing head, a lever, a spring clip and other common tools for preparing the soil sample, wherein the preparation materials can be steel, aluminum, alloys and the like. By utilizing the device and the method, the original sample of the ring cutter is prepared under a condition that a sample box is not completely opened, so that an opportunity that the soil sample is damaged in the preparation process of the sample is effectively reduced; for soil samples of loess, cracked clays and the like which are easily cracked, the ring cutter sample with high quality can be prepared, and the sample manufacturing success ratio is high and the scrap ratio is low; and for sand soil with low cohesive force, the original sand soil sample can be sampled by a common soil taking device so as to further prepare the undisturbed soil sample of the ring cutter.

The present invention discloses a loess sample sampling device with soil sample cutting and extraction function, the loess sample sampling device with soil sample cutting and extraction function comprises a plurality of stand columns, a lower pressing plate, a horizontal fixed plate, a sampling cutter and a soil sample cutting and extraction mechanism, the sampling cutter is arranged on the bottom of the lower pressing plate, the horizontal fixed plate is provided with a lifting mechanism for driving the lower pressing plate to move up and down; the sampling cutter comprises a sampling ring cutter and a cylindrical protection casing, the sampling ring cutter vertically cuts into a loess soil layer from top to down, the cylindrical protection casing enters the loess soil layer synchronously with the sampling ring cutter, the soil sample cutting and extraction mechanism comprises a translational mechanism and a rotary cutting mechanism, the translational mechanism is located below the lower pressing plate, the rotary cutting mechanism is located below the translational mechanism, the rotary cutting mechanism comprises two translational cutting boards, two arc-shaped cutters, and multiple straight cutting steel wires, the two arc-shaped cutters are respectively arranged on the bottoms of the translational cutting boards, and the multiple straight cutting steel wires are connected between bottoms of the two arc-shaped cutters. The loess sample sampling device with soil sample cutting and extraction function is simple in structure, reasonable in design, easy to use and operate and good in use effect, and can be used for simply and fast completing a sampling procedure, and the sampling effect is good.

The invention discloses a network flow sampling method and a network flow sampling system, and belongs to the field of communication. The method comprises the following steps: acquiring the network flow according to a set rule, and sending the network flow through an external network; receiving the network flow, and converging the network flow according to a preset rule; and analyzing the converged network flow according to requirements of users. The network flow sampling system comprises a first network repeater, a second network repeater and a network flow analysis device. The system completes different network flow processing functions through the first network repeater and the second network repeater, and connects the two repeaters for communication through the external network, so that the system reduces the cost of the devices, contributes to expansion and flexible application, and reduces the operation cost due to realization of far-end convergence by using network resources.

The invention provides a sampling device for river water quality detection, and belongs to the technical field of environmental protection equipment, and the sampling device comprises a support bottomplate, a support vertical rod rotatably arranged at the upper part of the support bottom plate, a protection box body telescopically connected to the side wall of one end, far away from the support bottom plate, of the support vertical rod, and a sampling assembly arranged at the bottom of the protection box body; and the sampling assembly comprises a sampling cylinder, and a through hole is formed in the side wall of the sampling cylinder. According to the embodiment of the invention, after the support bottom plate is fixed, by rotating the support vertical rod, the protection box body drives the sampling assembly to move to the position above a river channel, and the sampling assembly stretches into river water; the driving assembly drives a round rod and a square rod to be away from asampling barrel through a transmission assembly, and a plug body is driven to be separated from the through hole, so that the river water can enter the sampling barrel from the through hole, and riverwater sampling is achieved. The device has the advantages of convenience in use and good sampling effect, and the accuracy and reliability of subsequent detection results are greatly improved.

A delay line system for high frequency signal transmission comprises a first delay line and a second delay line that are each tapped. The first delay line comprises a first terminal and a second terminal, and the second delay line comprises a first terminal and a second terminal. The first delay line and the second delay line are configured in a manner whereby an analog input signal applied to the first terminal of the first delay line propagates through the first delay line in a first direction, a clock signal applied to the first terminal of the second delay line propagates through the second delay line in a second direction, and the first direction is opposite to the second direction. Further, an oscilloscope for measuring high frequency signals comprises an ADC, which comprises a high frequency sampler, which comprises such a delay line system.

The invention discloses a search method of a variable-step-size protein conformational space on the basis of copy exchange. A strategy of a variable step size and copy exchange is adopted to search the protein conformational space, and different fragment assembly (FA) step sizes and Monte Carlo (MC) disturbance step sizes are given to different energy layers according to the weights of the energy layers. A big FA step size and a small MC step size are used in a high-energy area in the conformational space, and as the conformational search gradually approaches a low-energy area, the FA step size and the MC step size are changed, and a small FA step size and a big MC step size are used in the low-energy area. Meanwhile, temperature is layered in the conformational space, and corresponding Metropolis criterions are adopted in different temperature layers to judge whether to receive a current conformation or not. A capability of the conformation on jumping out of a local minimum point is enhanced, and meanwhile, the diversity of individuals is kept so as to enhance the search capability of near-native conformation in the conformational space.

The invention provides a smoke heating and sampling gun which at least comprises a smoke sampling cylinder and a heater, wherein a smoke sampling nozzle communicated with the smoke sampling cylinder is arranged at the front end of the smoke sampling cylinder; a smoke sampling pipe communicated with the smoke sampling cylinder is arranged at the rear end of the smoke sampling cylinder; a filter cartridge is arranged inside the smoke sampling cylinder; the heater is a spring heating ring in which a thermocouple is arranged; spring heating rings are tightly arranged outside the smoke sampling cylinder and the smoke sampling pipe in a sleeving manner; the spring heating rings are double-tube spring rings; one ends of the two spring rings are connected with each other to form a spring heating ring, and the other ends of the two spring rings are respectively connected with a power line to form positive and negative poles of the spring heating rings; an outer pipe is arranged outside the spring heating rings; a temperature controller and a power plug are arranged on the outer pipe; and the temperature controller is connected in series between the spring heating rings and the power plug. According to the sampling gun, the filter cartridge and the sampling pipe can be simultaneously heated, automatic heating and temperature control are realized, smooth sampling is guaranteed, the sampling result is accurate, and the sampling effect is good.